Exemple #1
0
void ne7ssh_crypt::computeMac (Botan::SecureVector<Botan::byte> &hmac, Botan::SecureVector<Botan::byte> &packet, uint32 seq)
{
  SecureVector<Botan::byte> macStr;
  uint32 nSeq = htonl (seq);
  
  if (hmacIn)
  {
    macStr = Botan::SecureVector<Botan::byte>((Botan::byte*)&nSeq, 4);
    macStr += packet;
    hmac = hmacIn->process (macStr);
  }
  else hmac.clear();
}
void ne7ssh_string::bn2vector(Botan::SecureVector<Botan::byte>& result, const Botan::BigInt& bi)
{
    int high;
    Botan::byte zero = '\0';

    SecureVector<Botan::byte> strVector = BigInt::encode(bi);

    high = (*(strVector.begin()) & 0x80) ? 1 : 0;

    if (high)
    {
        result = SecureVector<Botan::byte>(&zero, 1);
    }
    else
    {
        result.clear();
    }
    result += strVector;
}
Exemple #3
0
bool ne7ssh_crypt::agree (Botan::SecureVector<Botan::byte> &result, const char* local, Botan::SecureVector<Botan::byte> &remote)
{
  ne7ssh_string localAlgos (local, 0);
  ne7ssh_string remoteAlgos (remote, 0);
  char* localAlgo, *remoteAlgo;
  bool match;
  size_t len;
  
  localAlgos.split (',');
  localAlgos.resetParts();
  remoteAlgos.split (',');
  remoteAlgos.resetParts();
  
  match = false;
  while ((localAlgo = localAlgos.nextPart()))
  {
    len = strlen(localAlgo);
    while ((remoteAlgo = remoteAlgos.nextPart()))
    {
      if (!memcmp (localAlgo, remoteAlgo, len))
      {
        match = true;
        break;
      }
    }
    if (match) break;
    remoteAlgos.resetParts();
  }
  if (match) 
  {
    result = Botan::SecureVector<Botan::byte>((Botan::byte*)localAlgo, (uint32_t) len);
    return true;
  }
  else 
  {
    result.clear();
    return false;
  }
}